The Riverside County District Attorney's Office will not be prosecuting Darrin Erb, the director of Stepping Stones Learning Center in Palm Springs who was accused in May of assaulting a student.

Because a criminal case will not be filed, Spokesman for the Riverside County District Attorney's Office John Hall said the county cannot release any details regarding the incident that left a 13-year-old student in a neck brace with a swollen eye.

"After a thorough review, our office has concluded there is a lack of sufficient evidence to file any criminal charges," Hall said.

The incident came to light in May after the student's mother, Storey Lantry Chavira, posted photos of her injured son on her Facebook account.

Days after the incident, Chavira picketed with family in front of the Stepping Stones campus on Gene Autry Trail. At the time, Chavira alleged that Erb had locked himself in a room with her son and assaulted him.

According to Stepping Stones Learning Center's website, the school works with students from ages 4 to 24 who may not fit into the "traditional school model."